The Sims 2 Castaway is the fourth handheld spin-off of the video game The Sims 2. It was released in the United States on October 22, 2007 and October 26, 2007 in the United Kingdom for the Nintendo DS. Unlike the other The Sims handheld games, The Sims 2 Castaway does not feature Sims from the other games, and has Survival-like elements.

The game begins on a boat after the player creates a Sim. After falling in a crate, and having that crate fall in the ocean, the player's Sim swims to a nearby string of islands. They then build a shelter, create a fire, and explore the three islands. They meet four other Castaways: Dr. Feelgood, a doctor who fell from a hot air balloon, Chef Butcher, a chef who fell off a cruise ship, Ms. Weeder, a farmer who was taken to the island by a tornado, and Suzy McDress, a college student. After performing several quests for these Sims, the player finds all the pieces of a map of the islands. Following the trail on the map, the Sim dives into the sea and finds an abandoned Pirate ship. The player, and the four other castaways, get in the pirate ship and set sail in order to return home. After that, the player can continue to play at the island in order to get 100% completion.

The Sims 2 Castaway features many new items in The Sims series. These items can be food, clothing, objects, and tools. 100% completion of the game requires the player to find each and every one of these items. The Sims 2 Castaway also features many minigames. These minigames usually offer items as a reward, such as Bugs from the Bug collection minigame, and Fish from the Spear fishing minigame. A new feature in The Sims 2 Castaway is Recipes. They require one or two items to create an all-new item.